Question

If cos 3A = sin 7 A, then​

Answer 1

Answer:

CONCEPT OF TRIGONOMETRIC IDENTITIES FOR COMPLEMENTARY ANGLES , FOUR FUNDAMENTAL OPERATIONS , APPLICATION OF LINEAR EQUATION .

Step-by-step explanation:

cos 3A = sin 7A

So , sin (90-3A) = sin 7A [SO , COS THETA = SIN (90-THETA) SAME AS THETA = 3A , COS 3A = SIN (90 - 7A) ]

SO , 90 - 3A = 7A

SO , 90 = 7A + 3A

SO , 90 = 10A

SO , A = 90 / 10

SO , A = 9.

ANSWER :- THE VALUE OF "A" IS "9°".

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Answer 2

Answer:

A=9 u will easily get it

Step-by-step explanation:

may be its helpfull