Question

If tan A=3/4 , then cos2A-Sin2A=

(a) 7/25 (b) 1 (c) -7/5 (d) 4/25

Please answer this question please​

Answer 1

Answer:

B 1

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Answer 2

Step-by-step explanation:

tan2A = ¾ ,. So that sec2A = 5/4

then,

cos2A-sin2A = 1/5