3 years ago

Sin30=cos(2x) then x=

Mathematics

1 answer:

Paraphin [41]3 years ago

8 0

Answer:

x = 30.

Step-by-step explanation:

Use the identity sin A = cos (90 - A).

So sin 30 = cos (90 - 30) = cos 60.

cos 2x = cos 60

so x = 30.

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nirvana33 [79]

Answer:

2 hours babysitting

Step-by-step explanation:

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3 years ago

Find the measure of ZDCF. C F mDF = 49 G E MEG = 127 Find the measure of angle DCF

AleksandrR [38]

Answer:

Step-by-step explanation:

Comment

If two secants intersect outside a circle (as these two do) then the angle at which they meet is 1/2 the difference between the intersected arcs. Put much simpler <DCF = 1/2 (arc EG - arc DF)

Givens

Arc EG = 127

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Solution

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2 years ago

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dolphi86 [110]

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