if 8cosA - 15sinA =0 ; evaluate sinA + cosA/ 2cosA + sinA into secA/tanA
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Answer:
8tanA=15⇒tanA=
8
15
Now,
sinA+cosA
sinA−cosA
Multiply and divide by cosA
=
cosA
sinA
+
cosA
cosA
cosA
sinA
−
cosA
cosA
=
tanA+1
tanA−1
Now, substitute the value of tanA
=
8
15
+1
8
15
−1= 23
7
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