Solve for angle C of the oblique spherical triangle ABC given, a = 80°, c = 115° and A = 72°
A). 61°
B). 85°
C). 95°
D). 119°
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3. What is the simplified value of $\sqrt{\frac{1}{sin^{2}A}+\frac{1}{cos^{2}A}}$ ?
4. What is the simplified value of $sec^{6} A - tan^{6}A - 3 sec^{2} A tan^{2} A$?
7. Flat surface like blackboard is classified as
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