Question

प्रश्नावली 4(B)
n- सिद्ध कीजिए कि :
2)
.
-1
3
sin
+
5
=+sin-18
sin-1
17
77
85
[CBSE 2012,M.P.2016]
2
sin -15
+sin -116
-14
= COS
5
13
65
sin
3
+cos
5
-112
-133
= COS
13
65
[M.P.2010,CBSE 2012]​

Answer 1

Answer:

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