Question

Without using trigonometric tables, find the value of each of the expressions
given below:
[CBSE 2015]
12. 3cot 31°tan 15° cot 27° tan 75°cot 63°cot 59°
cos 580
cos 38°cosec 52°
13. 2
-
3
[CBSE 2012]
sin 32°
tan 15°tan 60° tan 75°
cos 70°
14.
cos 55°cosec 35°
+
sin 20° tan 5° tan 25°tan 45º tan 65° tan 85°
15.
sin²22° + sin’68°
+ sin’63° + cos 63°sin 27°
cos²22° + cos²68°
2 cos 43°cosec 47°
16.
cos 65° cosec 34°
+
sin 25°
[CBSE 2015]
sec 56°
tan 10° tan 40° tan 50° tan 80°
17. cot Otan (90° - 0) - sec (90° - 0)cosec + sin65° + sin225°
+ V3 tan 5º tan 45º tan 85º.
(CBSE 2016]
cong
cono
Al
20EO
2CER​

Answer 1

Answer:

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