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DanielleElmas [232]
3 years ago
12

Sin(x+22)°=cos(2x−7)°

Mathematics
2 answers:
Alekssandra [29.7K]3 years ago
8 0
To answer this, it must be noted that the trigonometric functions sine and cosine will have the same values if the angles are complementary (meaning, their sum is 90°). 
                                         90 = (x + 22) + (2x - 7)
The value of x from the equation is 25. 
Diano4ka-milaya [45]3 years ago
3 0

Answer:

x = 25

Step-by-step explanation:

Given : \sin (x+22)^{\circ}=\cos (2x-7)^{\circ}

We have to find the value of x.

Consider the given  \sin (x+22)^{\circ}=\cos (2x-7)^{\circ}

We know,

\sin\theta=\cos(90^{\circ}-\theta)

Consider the left side  \sin (x+22)^{\circ}=\cos(90^{\circ}-(x+22)^{\circ})

thus,

\sin (x+22)^{\circ}=\cos (2x-7)^{\circ} becomes,

\cos(90^{\circ}-(x+22)^{\circ})=\cos (2x-7)^{\circ}

Simplify for x,

\cos(68-x)=\cos (2x-7)

Thus, 68 - x = 2x - 7

Adding x both side , we have

68 = 3x - 7

Adding 7 both side, we have,

75 = 3x

Divide both side by 3, we have,

x = 25

Thus, x = 25

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