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yan [13]
3 years ago
9

Sinx cosx tanx=1-cos^2x

Mathematics
1 answer:
Marizza181 [45]3 years ago
5 0
Tan x = sin x/ cos x. Cos x cancels. Sin^2 x =1-cos^2 x (standard trig identity) 
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0.3(4-x)=x-1.4 how do you solve this problem?
tresset_1 [31]

Answer:

x = 2.

Step-by-step explanation:

Solve for x:

0.3 (4 - x) = x - 1.4

Expand out terms of the left hand side:

1.2 - 0.3 x = x - 1.4

Subtract x from both sides:

1.2 + (-0.3 x - x) = (x - x) - 1.4

-0.3 x - x = -1.3 x:

-1.3 x + 1.2 = (x - x) - 1.4

x - x = 0:

1.2 - 1.3 x = -1.4

Subtract 1.2` from both sides:

(1.2 - 1.2) - 1.3 x = -1.2 - 1.4

1.2 - 1.2 = 0:

-1.3 x = -1.2 - 1.4

-1.2 - 1.4 = -2.6:

-1.3 x = -2.6

Divide both sides of -1.3 x = -2.6 by -1.3:

(-1.3 x)/(-1.3) = (-2.6)/(-1.3)

(-1.3)/(-1.3) = 1:

x = (-2.6)/(-1.3)

(-2.6)/(-1.3) = 2.:

Answer:  x = 2.

4 0
3 years ago
2) Show is fang steadily in Syracuse, New York. After 2 hours 4 inches of snow has fallen
Aleks [24]

Answer:

y = 2x

48 inches of snow

Step-by-step explanation:

6 0
3 years ago
Solve the equation for Y.Then find the value of Y for the given value of X.
UNO [17]
Xy-3x=40, x=5
x(y-3)=40
y-3=(40/x)
y=(40/x)+3

y=(40/5)+3
y=8+3
y=11
6 0
3 years ago
The equation 2y = 8x represents a proportional relationship. What is the constant of proportionality?
Dovator [93]

Answer:4

Step-by-step explanation:

2y = 8x

Divide through by 2

2Y/2 = 8X/2

Y = 4X

Therefore the constant of proportionality is 4

5 0
3 years ago
Read 2 more answers
Given: ΔPSQ, PS = SQ PΔPSQ = 50 SQ – PQ = 1 Find: Area of ΔPSQ
Pachacha [2.7K]
The first part is to find the length SQ which is equal to SP.
Use the sine rule.
SQ/sin 65 = (SQ - 1)/Sin50
(sin50)/(sin 65) = (SQ-1)/SQ
0.8452(SQ) = SQ-1
0.1547SQ = 1
SQ = 6.46 
The formula to apply here is:
Area=1/2(SQ)(SQ)sin50
        = 0.5 × 6.46 × 6.46 × sin50
        = 15.984
3 0
3 years ago
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